Safety attachment for spinning-mules



(No Model.)

E. G. VARNBY.

SAFETY ATTACHMENT FOR SPINNING MULES.

No. 517,314. Patented Mar. 27, 18914'.

NITED STATES PATENT FFIC.

EDWARD G. VARNEY, OF HARTLAND, MAINE.

SAFETY ATTACHMENT FOR SPINNING-MULES.

SPECIFICATION forming part of Letters Patent No. 517,314, dated March27, 1894.

Application led November 8, 1893. Serial No. 490.374. (No model.)

To aZZ whom it may concern,.-

JBe itknown that I, EDWARD G. VARNEY, a citizen of the United States,residing at Hartland,`in, the county of Somerset and State of4 Maine,have'invented certain ynew and useful Improvementsin SafetyAttachmentsforS pinning-Mules, of which the following is a speci iication,reference being had therein to the accompanying drawings.

This invention relates to a safety device or attachment for spinningmules which is designed particularly for attachment to that class ofmules known as the Davis da Furber mules.

The invention has for its object to provide simple and improved meansfor instantly stopping the outward movement of the carriage, and toprevent the back-off mechanism from being thrown into gear if thetwist-slide zo should drop, prematurely, at any pointin the outwardmovement of the carriage, that is, before it reaches the point in itsoutward movement where it operates the mechanism which throws out ofgear the running-out- 2 5 clutch. By thus stopping the carriage thedanger of breaking the threads andthe difficulty of having a softuntwisted section in each strand of yarn, as is the casein the mules ofthe usual construction when the twist drops o when the carriage isrunning out, is avoided. In the drawings z-Figure lis a plan view of aportion of a mule, the parts shown being in the position they assumewhen the carriage is being run out. Fig. 2 is a rear elevation of 3 5the parts shown in Fig. 1, said parts being in the position they assumewhen the carriage is being run in. Fig. 3 is a vertical sectional viewon line Ein-3 of Fig. 1; and Fig. 4 is a horizontal sectional view takenon line 4-4 of 4o Fig. 3.

' Referring to the various parts by letters a, designates therunningin-shaft; b the run` ning-inscrolls; o the running-in-clutch; cZthe back-o-pulley; e the cone friction-clutch member which engages theback-oi-pulley;

f the running-out-shaft; g the running-outscrollsg h the running-out ordraft-clutch, and i the draft-clutch-fork; i the twist-slide; la thebackolever5 Z the slide which operates the 5o draft-clutch-fork; m fmthe springs which operate the backoff-lever, the slide which operatesthe draft-clutch-fork and the long horizontal rod y; 'n the spring whichoperates the draft-clutch-fork. These partsare constructed and operateas usual and form no part of my invention.

On the left-hand end of the back-o-lever k adjacent to the lower end ofthe draft-clutch fork isy secured a collar A which is adjustable on thelever in order to secure its proper operative position. A downwardlyextending lug or dog A is formed on the lower side of this collar for apurpose which will presently appear.

The draft-clutch-fork Z is provided near its lower end with a forwardlyprojecting armB which is screwed into the said fork and is adj ustabletherein, as shown. This arm extends forwardly la suitable distance andhas formed in its left hand edge, near its inner` end, a notch B. Thearm B and the collar A are so adjusted on their respective supportingarms that the notch B in the arm B will, at the proper instant, engagethe lug or dog on the collar A and thereby lock the back-ofE-leveragainst further movement until the lower end of the draft-ciutch-forkhas been moved to the right by the reversing mechanism in the usual way.

The operation of the device is as follows:- When the carriage completesitsinward travel the reversing mechanisms are operated in the usual way,and as the draft-clutch-fork is released from its slide and permitted tooperate the draft-clutch under the stress of the spring n t0 run out thecarriage, the notch B in the arm B will engage the dog A on the collar Aand thereby lock the back-oti-lever against any further movement whilethe carriage is running out. The parts remain in this posi- .tion untilthe carriage, at the limit of its outward movement', operates thedevices which release the slide Z, and said slide when released operatesthe draft-clutch-fork and disengages the draft-clutch and stops therunning-out of the carriage. As the lower end of the draftclutch-fork ismoved to the right by the slide Z the arm B is moved away from the dog Aand the back-ofE-lever is released and may operate in the usual manneruntil the carriage begins its outward movement when it is again lockedas described. .Should the twist-slide drop while the carriage is runningICO out the belt shifter, operated by the twist slide in the usual Way,would ship the belt from the driving-pulley to the running-inpulley, andthereby stop the outward movement of the carriage, and as thebaek-ofE-lever would still be locked it could not operate the clutchescontrolled by it and the back-off gearing would run loose on itsshafting and the mule would be stopped. As is manifest, as the outwardmovement of the carriage is stopped instantly, and the back-oit gearingheld out of operative engagement all danger of breaking the threads andthe diiculty of having a soft untwisted portion in each of the threadswill be effectually avoided.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

l. The eombination,in a mule, of the backoi-lever, thedraft-clutch-fork, the slide Z, and a safety catch adjacent to thebackoft lever and adapted to antomatlcall y engage and lock the sauleduring the outward movement of the carriage substantially as and for thepur pose set forth.

2. The combination, ina 1nule,of the backoff-lever, thedraft-clutch-fork, the slide l, and a safety device carried by thedraftclutch fork, which device is adapted to engage and lock thebacl-oflever during the outward movement of the carriage and to releasethe back-off-lever when the draft-clutch is disengaged, substantiallyYas and for the purpose Set forth.

3. The combination, in a mule, of the backoi-lever, thedraft-clutch-fork, and an adJ ustable catch carried by saiddraft-clntch-fork, said catch engaging and locking the back-offlever, asdescribed, and releasing said lever when the draft-clutch is disengaged,substantially as described.

4. The combination, in a mule, of the backoff-lever, thedraft-clutchfork, an adjustable dog carried by the backoflever, and anarm or catch carried by the draft-clutch-fork,sa1d arm or catch adaptedto engage said dog and thereby lock the back-o-lever, as descrlbed, andto release said lever when the draftclutch is disengaged, substantiallyas described.

5. The combination, in a mule, of the backot-1ever, thedraft-clutchfork, an adjustable dog carried by the back-o-lever, and anad justable horizontal arm carried by the draftclutch-fork, said arinhaving a notch formed in it and adapted to engage the dog on theback-off-lever and thereby lock said back-oitlever as described, and torelease said lever when the draft-clutch is disengaged, substantially asdescribed.

In testimony whereof Iatiix my signature in presence of two witnesses.

EDWARD G. VARNEY.

Witnesses:

RICHARD W. LUTHER, LINCOLN MERRIGK.

